23.
A:
Surveys are usually appropriate in case of social and behavioural sciences whereas experiments are mostly an essential feature of physical and natural sciences.
B:
Surveys are conducted in case of descriptive research studies whereas experiments are a part of experimental research studies
C:
Surveys provides methods of hypothesis testing whereas experiments are concerned with hypothesis formulation and testing the analysis of relationship between non-manipulated variables
D:
In surveys, variables that exist or have already occurred are selected and observed whereas experimental research provides a systematic and logical method for answering the question.
The answer is: C